I am not sure what you want to draw for your range of values but you can use this code as the basis for handling the values
if ( accx > 186)
; // do nothing for values greater than 186
GLCD.DrawLine(0, 63, 127, 0);
else if ( accx > 130)
GLCD.DrawLine(127, 63, 0, 0); // draw this line for values between 130 and 186
else if ( accx > 100)
GLCD.DrawLine(0, 63, 127, 0); // draw this line of values between 100 and 130
else if ( accx > 73)
GLCD.DrawLine(0, 32, 64, 0); // draw this line of values between 73 and 100
else
; // do nothing for values less than 73